Helen is much more kind to her youngest child than to the others,___________ of course, make the others unhappy.
Is it the letter you got yesterday ________ makes you so sad?
It’s important to listen to your teacher carefully in class, so try not to let your mind _________.
-Do you mind if I turn off the TV?-__________.
Jennifer, who is my best friend, said she would go abroad for further education __________.
A good teacher should leave some time for the students to _________ the knowledge.